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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.19923">arXiv:2412.19923</a> <span> [<a href="https://arxiv.org/pdf/2412.19923">pdf</a>, <a href="https://arxiv.org/format/2412.19923">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Measurement of the hard exclusive $蟺^{0}$ muoproduction cross section at COMPASS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Beckers%2C+J">J. Beckers</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo%2C+M+L">M. L. Crespo</a> , et al. (148 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2412.19923v2-abstract-short" style="display: inline;"> A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on the proton was performed in a wide kinematic region, with the photon virtuality $Q^2$ ranging from 1 to 8 (GeV/$c$)$^{\rm\, 2}$ and the Bjorken variable $x_{\rm Bj}$ ranging from 0.02 to 0.45. The data were collected at COMPASS at CERN using 160 GeV/$c$ longitudinally polarised $渭^+$ and $渭^-$ beam… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.19923v2-abstract-full').style.display = 'inline'; document.getElementById('2412.19923v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.19923v2-abstract-full" style="display: none;"> A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on the proton was performed in a wide kinematic region, with the photon virtuality $Q^2$ ranging from 1 to 8 (GeV/$c$)$^{\rm\, 2}$ and the Bjorken variable $x_{\rm Bj}$ ranging from 0.02 to 0.45. The data were collected at COMPASS at CERN using 160 GeV/$c$ longitudinally polarised $渭^+$ and $渭^-$ beams scattering off a 2.5 m long liquid hydrogen target. From the average of the measured $渭^+$ and $渭^-$ cross sections, the virtual-photon--proton cross section is determined as a function of the squared four-momentum transfer between the initial and final state proton in the range 0.08 (GeV/$c$)$^{\rm\, 2}$ $< |t| <$ 0.64 (GeV/$c$)$^{\rm\, 2}$. From its angular distribution, the combined contribution of transversely and longitudinally polarised photons are determined, as well as transverse--transverse and longitudinal--transverse interference contributions. They are studied as functions of four-momentum transfer $|t|$, photon virtuality $Q^2$ and virtual-photon energy $谓$. The longitudinal--transverse interference contribution is found to be compatible with zero. The significant transverse--transverse interference contribution reveals the existence of a dominant contribution by transversely polarized photons. This provides clear experimental evidence for the chiral-odd GPD $\overline{E}_T$. In addition, the existence of a non-negligible contribution of longitudinally polarized photons is suggested by the $|t|$-dependence of the cross section at $x_{\rm Bj} < $ 0.1 . Altogether, these results provide valuable input for future modelling of GPDs and thus of cross sections for exclusive pseudo-scalar meson production. Furthermore, they can be expected to facilitate the study of next-to-leading order corrections and higher-twist contributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.19923v2-abstract-full').style.display = 'none'; document.getElementById('2412.19923v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2024-346 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.12005">arXiv:2410.12005</a> <span> [<a href="https://arxiv.org/pdf/2410.12005">pdf</a>, <a href="https://arxiv.org/format/2410.12005">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Multiplicities of positive and negative pions, kaons and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Beckers%2C+J">J. Beckers</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo%2C+M+L">M. L. Crespo</a> , et al. (145 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.12005v1-abstract-short" style="display: inline;"> The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the fraction of the virtual-photon energy transferred to the final-state hadron $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam of both electric cha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.12005v1-abstract-full').style.display = 'inline'; document.getElementById('2410.12005v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.12005v1-abstract-full" style="display: none;"> The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the fraction of the virtual-photon energy transferred to the final-state hadron $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam of both electric charges and a liquid hydrogen target. These measurements cover the kinematic domain with photon virtuality $Q^2 > 1$ (GeV/$c)^2$, $0.004 < x < 0.4$, $0.1 < y < 0.7$ and $0.2 < z < 0.85$, in accordance with the kinematic domain used in earlier published COMPASS multiplicity measurements with an isoscalar target. The calculation of radiative corrections was improved by using the Monte Carlo generator DJANGOH, which results in up to 12\% larger corrections in the low-$x$ region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.12005v1-abstract-full').style.display = 'none'; document.getElementById('2410.12005v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 29 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2024-270 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.03728">arXiv:2409.03728</a> <span> [<a href="https://arxiv.org/pdf/2409.03728">pdf</a>, <a href="https://arxiv.org/format/2409.03728">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Multiplicity dependent $J/蠄$ and $蠄(2S)$ production at forward and backward rapidity in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=PHENIX+Collaboration"> PHENIX Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Antsupov%2C+S">S. Antsupov</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannikov%2C+E">E. Bannikov</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a> , et al. (276 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.03728v1-abstract-short" style="display: inline;"> The $J/蠄$ and $蠄(2S)$ charmonium states, composed of $c\bar{c}$ quark pairs and known since the 1970s, are widely believed to serve as ideal probes to test quantum chromodynamics in high-energy hadronic interactions. However, there is not yet a complete understanding of the charmonium-production mechanism. Recent measurements of $J/蠄$ production as a function of event charged-particle multiplicity… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.03728v1-abstract-full').style.display = 'inline'; document.getElementById('2409.03728v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.03728v1-abstract-full" style="display: none;"> The $J/蠄$ and $蠄(2S)$ charmonium states, composed of $c\bar{c}$ quark pairs and known since the 1970s, are widely believed to serve as ideal probes to test quantum chromodynamics in high-energy hadronic interactions. However, there is not yet a complete understanding of the charmonium-production mechanism. Recent measurements of $J/蠄$ production as a function of event charged-particle multiplicity at the collision energies of both the Large Hadron Collider (LHC) and the Relativistic Heavy Ion Collider (RHIC) show enhanced $J/蠄$ production yields with increasing multiplicity. One potential explanation for this type of dependence is multiparton interactions (MPI). We carry out the first measurements of self-normalized $J/蠄$ yields and the $蠄(2S)$ to $J/蠄$ ratio at both forward and backward rapidities as a function of self-normalized charged-particle multiplicity in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV. In addition, detailed {\sc pythia} studies tuned to RHIC energies were performed to investigate the MPI impacts. We find that the PHENIX data at RHIC are consistent with recent LHC measurements and can only be described by {\sc pythia} calculations that include MPI effects. The forward and backward $蠄(2S)$ to $J/蠄$ ratio, which serves as a unique and powerful approach to study final-state effects on charmonium production, is found to be less dependent on the charged-particle multiplicity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.03728v1-abstract-full').style.display = 'none'; document.getElementById('2409.03728v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">301 authors from 69 institutions, 8 pages, 3 figures. v1 is version submitted to Physical Review D Letters. HEPdata tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.11144">arXiv:2408.11144</a> <span> [<a href="https://arxiv.org/pdf/2408.11144">pdf</a>, <a href="https://arxiv.org/format/2408.11144">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive jet cross section and substructure in $p$$+$$p$ collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=PHENIX+Collaboration"> PHENIX Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Akimoto%2C+R">R. Akimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Alexander%2C+J">J. Alexander</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Antsupov%2C+S">S. Antsupov</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+K">K. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Atomssa%2C+E+T">E. T. Atomssa</a>, <a href="/search/hep-ex?searchtype=author&query=Awes%2C+T+C">T. C. Awes</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Bannikov%2C+E">E. Bannikov</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a> , et al. (422 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.11144v1-abstract-short" style="display: inline;"> The jet cross-section and jet-substructure observables in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-$k_{t}$ algorithm with a jet radius $R=0.3$ for jets with transverse momentum within $8.0<p_T<40.0$ Ge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.11144v1-abstract-full').style.display = 'inline'; document.getElementById('2408.11144v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.11144v1-abstract-full" style="display: none;"> The jet cross-section and jet-substructure observables in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-$k_{t}$ algorithm with a jet radius $R=0.3$ for jets with transverse momentum within $8.0<p_T<40.0$ GeV/$c$ and pseudorapidity $|畏|<0.15$. Measurements include the jet cross section, as well as distributions of SoftDrop-groomed momentum fraction ($z_g$), charged-particle transverse momentum with respect to jet axis ($j_T$), and radial distributions of charged particles within jets ($r$). Also meaureed was the distribution of $尉=-ln(z)$, where $z$ is the fraction of the jet momentum carried by the charged particle. The measurements are compared to theoretical next-to and next-to-next-to-leading-order calculatios, PYTHIA event generator, and to other existing experimental results. Indicated from these meaurements is a lower particle multiplicity in jets at RHIC energies when compared to models. Also noted are implications for future jet measurements with sPHENIX at RHIC as well as at the future Election-Ion Collider. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.11144v1-abstract-full').style.display = 'none'; document.getElementById('2408.11144v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">446 authors from 77 institutions, 11 pages, 8 figures. v1 is version submitted to Physical Review D. HEPdata tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.00309">arXiv:2401.00309</a> <span> [<a href="https://arxiv.org/pdf/2401.00309">pdf</a>, <a href="https://arxiv.org/format/2401.00309">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Asatryan%2C+S">S. Asatryan</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Beckers%2C+J">J. Beckers</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a> , et al. (162 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.00309v1-abstract-short" style="display: inline;"> New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 \gevv\ muon beam at CERN, balancing the existing data on transversely polarised proton targets. The first results from about… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00309v1-abstract-full').style.display = 'inline'; document.getElementById('2401.00309v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.00309v1-abstract-full" style="display: none;"> New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 \gevv\ muon beam at CERN, balancing the existing data on transversely polarised proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements. Using all the COMPASS proton and deuteron results, both the transversity and the Sivers distribution functions of the $u$ and $d$ quark, as well as the tensor charge in the measured $x$-range are extracted. In particular, the accuracy of the $d$ quark results is significantly improved. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00309v1-abstract-full').style.display = 'none'; document.getElementById('2401.00309v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2023-308 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.17379">arXiv:2312.17379</a> <span> [<a href="https://arxiv.org/pdf/2312.17379">pdf</a>, <a href="https://arxiv.org/format/2312.17379">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Beckers%2C+J">J. Beckers</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a> , et al. (159 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.17379v1-abstract-short" style="display: inline;"> The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c $蟺^{-}$ beam impinging on a transversely polarised ammonia target. Combining the data of both years, we present final results on the amplitudes of the five azimuthal modulations in the dimuon production cross section. Three of these transverse-spin-dependent azimuthal asymmetries (TSAs) pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.17379v1-abstract-full').style.display = 'inline'; document.getElementById('2312.17379v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.17379v1-abstract-full" style="display: none;"> The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c $蟺^{-}$ beam impinging on a transversely polarised ammonia target. Combining the data of both years, we present final results on the amplitudes of the five azimuthal modulations in the dimuon production cross section. Three of these transverse-spin-dependent azimuthal asymmetries (TSAs) probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs). The other two are induced by subleading effects. These TSAs provide unique new inputs for the study of the nucleon TMD PDFs and their universality properties. In particular, the Sivers TSA observed in this measurement is consistent with the fundamental QCD prediction of a sign change of naive time-reversal-odd TMD PDFs when comparing the Drell-Yan process with semi-inclusive measurements of deep inelastic scattering. Also, within the context of model predictions, the observed transversity TSA is consistent with the expectation of a sign change for the Boer-Mulders function. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.17379v1-abstract-full').style.display = 'none'; document.getElementById('2312.17379v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2023-307 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.07191">arXiv:2303.07191</a> <span> [<a href="https://arxiv.org/pdf/2303.07191">pdf</a>, <a href="https://arxiv.org/format/2303.07191">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.108.072016">10.1103/PhysRevD.108.072016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized $p$+$p$, $p$+Al, and $p$+Au collisions at $\sqrt{s_{NN}}=200$ GeV} </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a> , et al. (297 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.07191v2-abstract-short" style="display: inline;"> Reported here are transverse single-spin asymmetries ($A_{N}$) in the production of charged hadrons as a function of transverse momentum ($p_T$) and Feynman-$x$ ($x_F$) in polarized $p^{\uparrow}$+$p$, $p^{\uparrow}$+Al, and $p^{\uparrow}$+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements have been performed at forward and backward rapidity ($1.4<|畏|<2.4$) over the range of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.07191v2-abstract-full').style.display = 'inline'; document.getElementById('2303.07191v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.07191v2-abstract-full" style="display: none;"> Reported here are transverse single-spin asymmetries ($A_{N}$) in the production of charged hadrons as a function of transverse momentum ($p_T$) and Feynman-$x$ ($x_F$) in polarized $p^{\uparrow}$+$p$, $p^{\uparrow}$+Al, and $p^{\uparrow}$+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements have been performed at forward and backward rapidity ($1.4<|畏|<2.4$) over the range of $1.5<p_{T}<7.0~{\rm GeV}/c$ and $0.04<|x_{F}|<0.2$. A nonzero asymmetry is observed for positively charged hadrons at forward rapidity ($x_F>0$) in $p^{\uparrow}$+$p$ collisions, whereas the $p^{\uparrow}$+Al and $p^{\uparrow}$+Au results show smaller asymmetries. This finding provides new opportunities to investigate the origin of transverse single-spin asymmetries and a tool to study nuclear effects in $p$+$A$ collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.07191v2-abstract-full').style.display = 'none'; document.getElementById('2303.07191v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">322 authors from 70 institutions, 13 pages, 9 figures, 13 tables, one appendix, 2015 data. v2 is version accepted for publication in Phys. Rev. D. HEPData tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 108, 072016 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.07190">arXiv:2303.07190</a> <span> [<a href="https://arxiv.org/pdf/2303.07190">pdf</a>, <a href="https://arxiv.org/format/2303.07190">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Transverse single-spin asymmetry of midrapidity $蟺^{0}$ and $畏$ mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=$ 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a> , et al. (297 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.07190v2-abstract-short" style="display: inline;"> Presented are the first measurements of the transverse single-spin asymmetries ($A_N$) for neutral pions and eta mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=200$ GeV in the pseudorapidity range $|畏|<$0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.07190v2-abstract-full').style.display = 'inline'; document.getElementById('2303.07190v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.07190v2-abstract-full" style="display: none;"> Presented are the first measurements of the transverse single-spin asymmetries ($A_N$) for neutral pions and eta mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=200$ GeV in the pseudorapidity range $|畏|<$0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in $p$+$p$ collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.07190v2-abstract-full').style.display = 'none'; document.getElementById('2303.07190v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">322 authors from 70 institutions, 8 pages, 2 figures, 1 table, 2015 data. v2 is version accepted for publication in Phys. Rev. D. HEPData tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.00093">arXiv:2211.00093</a> <span> [<a href="https://arxiv.org/pdf/2211.00093">pdf</a>, <a href="https://arxiv.org/format/2211.00093">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2023.137950">10.1016/j.physletb.2023.137950 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $蟻^0$ mesons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a> , et al. (167 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2211.00093v2-abstract-short" style="display: inline;"> The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $蟻^0$ mesons. The analysis is based on the data set collected in deep inelastic scatt… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.00093v2-abstract-full').style.display = 'inline'; document.getElementById('2211.00093v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.00093v2-abstract-full" style="display: none;"> The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $蟻^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$ $渭^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $蟻^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.00093v2-abstract-full').style.display = 'none'; document.getElementById('2211.00093v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2022--234 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.16932">arXiv:2210.16932</a> <span> [<a href="https://arxiv.org/pdf/2210.16932">pdf</a>, <a href="https://arxiv.org/format/2210.16932">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Spin Density Matrix Elements in Exclusive $蟻^0$ Meson Muoproduction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alice%2C+C">C. Alice</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a> , et al. (165 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.16932v2-abstract-short" style="display: inline;"> We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $蟻^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $ 渭^{+}$ and $ 渭^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\rm{T}}^2 <$ 0.5 (GeV/$c$)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.16932v2-abstract-full').style.display = 'inline'; document.getElementById('2210.16932v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.16932v2-abstract-full" style="display: none;"> We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $蟻^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $ 渭^{+}$ and $ 渭^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\rm{T}}^2 <$ 0.5 (GeV/$c$)$^2$. Here, $W$ denotes the mass of the final hadronic system, $Q^2$ the virtuality of the exchanged photon, and $p_{\rm{T}}$ the transverse momentum of the $蟻^0$ meson with respect to the virtual-photon direction. The measured non-zero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons ($纬^*_T \to V^{ }_L$) indicate a violation of $s$-channel helicity conservation. Additionally, we observe a dominant contribution of natural-parity-exchange transitions and a very small contribution of unnatural-parity-exchange transitions, which is compatible with zero within experimental uncertainties. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow one to evaluate in a model-dependent way the role of parton helicity-flip GPDs in exclusive $蟻^0$ production. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.16932v2-abstract-full').style.display = 'none'; document.getElementById('2210.16932v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2022-231 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.12899">arXiv:2204.12899</a> <span> [<a href="https://arxiv.org/pdf/2204.12899">pdf</a>, <a href="https://arxiv.org/format/2204.12899">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.107.052012">10.1103/PhysRevD.107.052012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improving constraints on gluon spin-momentum correlations in transversely polarized protons via midrapidity open-heavy-flavor electrons in $p^{\uparrow}+p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a> , et al. (299 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.12899v2-abstract-short" style="display: inline;"> Polarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure of the proton. Midrapidity open-heavy-flavor production at $\sqrt{s}=200$ GeV is dominated by gluon-gluon fusion, providing heightened sensitivity to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.12899v2-abstract-full').style.display = 'inline'; document.getElementById('2204.12899v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.12899v2-abstract-full" style="display: none;"> Polarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure of the proton. Midrapidity open-heavy-flavor production at $\sqrt{s}=200$ GeV is dominated by gluon-gluon fusion, providing heightened sensitivity to gluon dynamics relative to other production channels. Transverse single-spin asymmetries of positrons and electrons from heavy-flavor hadron decays are measured at midrapidity using the PHENIX detector at the Relativistic Heavy Ion Collider. These charge-separated measurements are sensitive to gluon correlators that can in principle be related to gluon orbital angular momentum via model calculations. Explicit constraints on gluon correlators are extracted for two separate models, one of which had not been constrained previously. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.12899v2-abstract-full').style.display = 'none'; document.getElementById('2204.12899v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">324 authors from 70 institutions, 11 pages, 5 figures, 3 tables, 2015 data. v2 is version accepted for publication in PRD. HEPData tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.01817">arXiv:2204.01817</a> <span> [<a href="https://arxiv.org/pdf/2204.01817">pdf</a>, <a href="https://arxiv.org/format/2204.01817">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2023.137702">10.1016/j.physletb.2023.137702 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Double $J/蠄$ production in pion-nucleon scattering at COMPASS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a>, <a href="/search/hep-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/hep-ex?searchtype=author&query=Correia%2C+P+M+M">P. M. M. Correia</a> , et al. (170 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.01817v1-abstract-short" style="display: inline;"> We present the study of the production of double $J/蠄$ mesons using COMPASS data collected with a 190 GeV/$c$ $蟺^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/蠄$ events are analysed, and the double $J/蠄$ production cross section is estimated for each of the COMPASS targets. The results are compared to predictions from single- and double-parto… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.01817v1-abstract-full').style.display = 'inline'; document.getElementById('2204.01817v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.01817v1-abstract-full" style="display: none;"> We present the study of the production of double $J/蠄$ mesons using COMPASS data collected with a 190 GeV/$c$ $蟺^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/蠄$ events are analysed, and the double $J/蠄$ production cross section is estimated for each of the COMPASS targets. The results are compared to predictions from single- and double-parton scattering models as well as the pion intrinsic charm and the tetraquark exotic resonance hypotheses. It is demonstrated that the single parton scattering production mechanism gives the dominant contribution that is sufficient to describe the data. An upper limit on the double intrinsic charm content of pion is evaluated. No significant signatures that could be associated with exotic tetraquarks are found in the double $J/蠄$ mass spectrum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.01817v1-abstract-full').style.display = 'none'; document.getElementById('2204.01817v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2022--073 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.06087">arXiv:2203.06087</a> <span> [<a href="https://arxiv.org/pdf/2203.06087">pdf</a>, <a href="https://arxiv.org/format/2203.06087">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.106.014908">10.1103/PhysRevC.106.014908 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of $蠁$-meson production in $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Beckman%2C+S">S. Beckman</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a> , et al. (346 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.06087v2-abstract-short" style="display: inline;"> Small nuclear collisions are mainly sensitive to cold-nuclear-matter effects; however, the collective behavior observed in these collisions shows a hint of hot-nuclear-matter effects. The identified-particle spectra, especially the $蠁$ mesons which contain strange and antistrange quarks and have a relatively small hadronic-interaction cross section, are a good tool to study these effects. The PHEN… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.06087v2-abstract-full').style.display = 'inline'; document.getElementById('2203.06087v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.06087v2-abstract-full" style="display: none;"> Small nuclear collisions are mainly sensitive to cold-nuclear-matter effects; however, the collective behavior observed in these collisions shows a hint of hot-nuclear-matter effects. The identified-particle spectra, especially the $蠁$ mesons which contain strange and antistrange quarks and have a relatively small hadronic-interaction cross section, are a good tool to study these effects. The PHENIX experiment has measured $蠁$ mesons in a specific set of small collision systems $p$$+$Al, $p$$+$Au, and $^3$He$+$Au, as well as $d$$+$Au [Phys. Rev. C {\bf 83}, 024909 (2011)], at $\sqrt{s_{_{NN}}}=200$ GeV. The transverse-momentum spectra and nuclear-modification factors are presented and compared to theoretical-model predictions. The comparisons with different calculations suggest that quark-gluon plasma may be formed in these small collision systems at $\sqrt{s_{_{NN}}}=200$ GeV. However, the volume and the lifetime of the produced medium may be insufficient for observing strangeness-enhancement and jet-quenching effects. Comparison with calculations suggests that the main production mechanisms of $蠁$ mesons at midrapidity may be different in $p$$+$Al versus $p/d/$$^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. While thermal quark recombination seems to dominate in $p/d/$$^3$He$+$Au collisions, fragmentation seems to be the main production mechanism in $p$$+$Al collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.06087v2-abstract-full').style.display = 'none'; document.getElementById('2203.06087v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">371 authors from 72 institutions, 13 pages, 7 figures, 7 tables, 2014 and 2015 data. v2 is version accepted for publication Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 106, 014908 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.03863">arXiv:2202.03863</a> <span> [<a href="https://arxiv.org/pdf/2202.03863">pdf</a>, <a href="https://arxiv.org/format/2202.03863">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.064912">10.1103/PhysRevC.105.064912 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $蠄(2S)$ nuclear modification at backward and forward rapidity in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a> , et al. (291 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2202.03863v2-abstract-short" style="display: inline;"> Suppression of the $J/蠄$ nuclear-modification factor has been seen as a trademark signature of final-state effects in large collision systems for decades. In small systems, the nuclear modification was attributed to cold-nuclear-matter effects until the observation of strong differential suppression of the $蠄(2S)$ state in $p/d$$+$$A$ collisions suggested the presence of final-state effects. Resul… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03863v2-abstract-full').style.display = 'inline'; document.getElementById('2202.03863v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.03863v2-abstract-full" style="display: none;"> Suppression of the $J/蠄$ nuclear-modification factor has been seen as a trademark signature of final-state effects in large collision systems for decades. In small systems, the nuclear modification was attributed to cold-nuclear-matter effects until the observation of strong differential suppression of the $蠄(2S)$ state in $p/d$$+$$A$ collisions suggested the presence of final-state effects. Results of $J/蠄$ and $蠄(2S)$ measurements in the dimuon decay channel are presented here for $p$$+$$p$, $p$$+$Al, and $p$$+$Au collision systems at $\sqrt{s_{_{NN}}}=200$ GeV. The results are predominantly shown in the form of the nuclear-modification factor, $R_{pA}$, the ratio of the $蠄(2S)$ invariant yield per nucleon-nucleon collision in collisions of proton on target nucleus to that in $p$$+$$p$ collisions. Measurements of the $J/蠄$ and $蠄(2S)$ nuclear-modification factor are compared with shadowing and transport-model predictions, as well as to complementary measurements at Large-Hadron-Collider energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03863v2-abstract-full').style.display = 'none'; document.getElementById('2202.03863v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">315 authors from 69 institutions, 16 pages, 9 figures, 4 tables, 2015 data. v2 is version accepted for publication in Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 105, 064912 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.05680">arXiv:2112.05680</a> <span> [<a href="https://arxiv.org/pdf/2112.05680">pdf</a>, <a href="https://arxiv.org/format/2112.05680">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.032003">10.1103/PhysRevD.105.032003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized $p{+}p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a> , et al. (286 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.05680v2-abstract-short" style="display: inline;"> In 2015, the PHENIX collaboration has measured single-spin asymmetries for charged pions in transversely polarized proton-proton collisions at the center of mass energy of $\sqrt{s}=200$ GeV. The pions were detected at central rapidities of $|畏|<0.35$. The single-spin asymmetries are consistent with zero for each charge individually, as well as consistent with the previously published neutral-pion… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.05680v2-abstract-full').style.display = 'inline'; document.getElementById('2112.05680v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.05680v2-abstract-full" style="display: none;"> In 2015, the PHENIX collaboration has measured single-spin asymmetries for charged pions in transversely polarized proton-proton collisions at the center of mass energy of $\sqrt{s}=200$ GeV. The pions were detected at central rapidities of $|畏|<0.35$. The single-spin asymmetries are consistent with zero for each charge individually, as well as consistent with the previously published neutral-pion asymmetries in the same rapidity range. However, they show a slight indication of charge-dependent differences which may suggest a flavor dependence in the underlying mechanisms that create these asymmetries. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.05680v2-abstract-full').style.display = 'none'; document.getElementById('2112.05680v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">311 authors from 68 institutions, 8 pages, 3 figures, 1 table. 2015 data. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, 032003 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.05756">arXiv:2111.05756</a> <span> [<a href="https://arxiv.org/pdf/2111.05756">pdf</a>, <a href="https://arxiv.org/format/2111.05756">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.064902">10.1103/PhysRevC.105.064902 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Systematic study of nuclear effects in $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV using $蟺^0$ production </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Al-Bataineh%2C+H">H. Al-Bataineh</a>, <a href="/search/hep-ex?searchtype=author&query=Alexander%2C+J">J. Alexander</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Angerami%2C+A">A. Angerami</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+K">K. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Aramaki%2C+Y">Y. Aramaki</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Atomssa%2C+E+T">E. T. Atomssa</a>, <a href="/search/hep-ex?searchtype=author&query=Averbeck%2C+R">R. Averbeck</a>, <a href="/search/hep-ex?searchtype=author&query=Awes%2C+T+C">T. C. Awes</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Baksay%2C+G">G. Baksay</a>, <a href="/search/hep-ex?searchtype=author&query=Baksay%2C+L">L. Baksay</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a> , et al. (529 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.05756v2-abstract-short" style="display: inline;"> The PHENIX collaboration presents a systematic study of $蟺^0$ production from $p$$+$$p$, $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. Measurements were performed with different centrality selections as well as the total inelastic, 0%--100%, selection for all collision systems. For 0%--100% collisions, the nuclear modification factors, $R_{xA}$, are cons… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.05756v2-abstract-full').style.display = 'inline'; document.getElementById('2111.05756v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.05756v2-abstract-full" style="display: none;"> The PHENIX collaboration presents a systematic study of $蟺^0$ production from $p$$+$$p$, $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. Measurements were performed with different centrality selections as well as the total inelastic, 0%--100%, selection for all collision systems. For 0%--100% collisions, the nuclear modification factors, $R_{xA}$, are consistent with unity for $p_T$ above 8 GeV/$c$, but exhibit an enhancement in peripheral collisions and a suppression in central collisions. The enhancement and suppression characteristics are similar for all systems for the same centrality class. It is shown that for high-$p_T$-$蟺^0$ production, the nucleons in the $d$ and $^3$He interact mostly independently with the Au nucleus and that the counter intuitive centrality dependence is likely due to a physical correlation between multiplicity and the presence of a hard scattering process. These observations disfavor models where parton energy loss has a significant contribution to nuclear modifications in small systems. Nuclear modifications at lower $p_T$ resemble the Cronin effect -- an increase followed by a peak in central or inelastic collisions and a plateau in peripheral collisions. The peak height has a characteristic ordering by system size as $p$$+$Au $>$ $d$$+$Au $>$ $^{3}$He$+$Au $>$ $p$$+$Al. For collisions with Au ions, current calculations based on initial state cold nuclear matter effects result in the opposite order, suggesting the presence of other contributions to nuclear modifications, in particular at lower $p_T$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.05756v2-abstract-full').style.display = 'none'; document.getElementById('2111.05756v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">554 authors from 81 institutions, 21 pages, 13 figures, and 3 tables. Data from 2008, 2014, and 2015. v2 is version accepted for publication in Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 105, 064902 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.07504">arXiv:2110.07504</a> <span> [<a href="https://arxiv.org/pdf/2110.07504">pdf</a>, <a href="https://arxiv.org/format/2110.07504">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.032004">10.1103/PhysRevD.105.032004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse single spin asymmetries of forward neutrons in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV as a function of transverse and longitudinal momenta </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a> , et al. (286 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.07504v2-abstract-short" style="display: inline;"> In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded $p$$+$$p$, $p$$+$Al, and $p$$+$Au collision data at center of mass energies of $\sqrt{s_{_{NN}}}=200$ GeV with the proton beam(s) transversely polarized. At very forward rapidities $畏>6.8$ relative to the polarized proton beam, neutrons were detected either inclusively or in (anti)correlation with detector activity re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.07504v2-abstract-full').style.display = 'inline'; document.getElementById('2110.07504v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.07504v2-abstract-full" style="display: none;"> In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded $p$$+$$p$, $p$$+$Al, and $p$$+$Au collision data at center of mass energies of $\sqrt{s_{_{NN}}}=200$ GeV with the proton beam(s) transversely polarized. At very forward rapidities $畏>6.8$ relative to the polarized proton beam, neutrons were detected either inclusively or in (anti)correlation with detector activity related to hard collisions. The resulting single spin asymmetries, that were previously reported, have now been extracted as a function of the transverse momentum of the neutron as well as its longitudinal momentum fraction $x_F$. The explicit kinematic dependence, combined with the correlation information allows for a closer look at the interplay of different mechanisms suggested to describe these asymmetries, such as hadronic interactions or electromagnetic interactions in ultra-peripheral collisions, UPC. Events that are correlated with a hard collision indeed display a mostly negative asymmetry that increases in magnitude as a function of transverse momentum with only little dependence on $x_F$. In contrast, events that are not likely to have emerged from a hard collision display positive asymmetries for the nuclear collisions with a kinematic dependence that resembles that of a UPC based model. Because the UPC interaction depends strongly on the charge of the nucleus, those effects are very small for $p$$+$$p$ collisions, moderate for $p$$+$Al collisions, and large for $p$$+$Au collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.07504v2-abstract-full').style.display = 'none'; document.getElementById('2110.07504v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">311 authors from 68 institutions, 12 pages, 8 figures, 2015 data. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, 032004 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.01744">arXiv:2108.01744</a> <span> [<a href="https://arxiv.org/pdf/2108.01744">pdf</a>, <a href="https://arxiv.org/format/2108.01744">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.012005">10.1103/PhysRevD.105.012005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The exotic meson $蟺_1(1600)$ with $J^{PC} = 1^{-+}$ and its decay into $蟻(770)蟺$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a> , et al. (171 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.01744v2-abstract-short" style="display: inline;"> We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $蟺^-蟺^-蟺^+$ using a hydrogen target and confirm the $蟺_1(1600) \to 蟻(770) 蟺$ amplitude, which interferes with a nonresonant $1^{-+}$ amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and diffe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.01744v2-abstract-full').style.display = 'inline'; document.getElementById('2108.01744v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.01744v2-abstract-full" style="display: none;"> We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $蟺^-蟺^-蟺^+$ using a hydrogen target and confirm the $蟺_1(1600) \to 蟻(770) 蟺$ amplitude, which interferes with a nonresonant $1^{-+}$ amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and different treatment of the dependence of the amplitudes on the squared four-momentum transfer and we thus reconcile their experimental findings. We study the nonresonant contributions to the $蟺^-蟺^-蟺^+$ final state using pseudo-data generated on the basis of a Deck model. Subjecting pseudo-data and real data to the same partial-wave analysis, we find good agreement concerning the spectral shape and its dependence on the squared four-momentum transfer for the $J^{PC} = 1^{-+}$ amplitude and also for amplitudes with other $J^{PC}$ quantum numbers. We investigate for the first time the amplitude of the $蟺^-蟺^+$ subsystem with $J^{PC} = 1^{--}$ in the $3蟺$ amplitude with $J^{PC} = 1^{-+}$ employing the novel freed-isobar analysis scheme. We reveal this $蟺^-蟺^+$ amplitude to be dominated by the $蟻(770)$ for both the $蟺_1(1600)$ and the nonresonant contribution. We determine the $蟻(770)$ resonance parameters within the three-pion final state. These findings largely confirm the underlying assumptions for the isobar model used in all previous partial-wave analyses addressing the $J^{PC} = 1^{-+}$ amplitude. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.01744v2-abstract-full').style.display = 'none'; document.getElementById('2108.01744v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D 105 (2022) 1, 012005 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.06634">arXiv:2107.06634</a> <span> [<a href="https://arxiv.org/pdf/2107.06634">pdf</a>, <a href="https://arxiv.org/format/2107.06634">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.024901">10.1103/PhysRevC.105.024901 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Kinematic dependence of azimuthal anisotropies in $p$$+$Au, $d$$+$Au, $^3$He+Au at $\sqrt{s_{_{NN}}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+K">K. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayuso%2C+C">C. Ayuso</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Beckman%2C+S">S. Beckman</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a> , et al. (360 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.06634v2-abstract-short" style="display: inline;"> There is strong evidence for the formation of small droplets of quark-gluon plasma in $p/d/^{3}$He+Au collisions at the Relativistic Heavy Ion Collider (RHIC) and in $p$+$p$/Pb collisions at the Large Hadron Collider. In particular, the analysis of data at RHIC for different geometries obtained by varying the projectile size and shape has proven insightful. In the present analysis, we find excelle… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.06634v2-abstract-full').style.display = 'inline'; document.getElementById('2107.06634v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.06634v2-abstract-full" style="display: none;"> There is strong evidence for the formation of small droplets of quark-gluon plasma in $p/d/^{3}$He+Au collisions at the Relativistic Heavy Ion Collider (RHIC) and in $p$+$p$/Pb collisions at the Large Hadron Collider. In particular, the analysis of data at RHIC for different geometries obtained by varying the projectile size and shape has proven insightful. In the present analysis, we find excellent agreement with the previously published PHENIX at RHIC results on elliptical and triangular flow with an independent analysis via the two-particle correlation method, which has quite different systematic uncertainties and an independent code base. In addition, the results are extended to other detector combinations with different kinematic (pseudorapidity) coverage. These results provide additional constraints on contributions from nonflow and longitudinal decorrelations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.06634v2-abstract-full').style.display = 'none'; document.getElementById('2107.06634v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">383 authors from 70 institutions, 13 pages, 12 figures, 4 tables, 2014,15,16 data (and supplemental material of 9 pages with 6 figures and 16 tables). v2 is version accepted for publication in Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.13585">arXiv:2104.13585</a> <span> [<a href="https://arxiv.org/pdf/2104.13585">pdf</a>, <a href="https://arxiv.org/format/2104.13585">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2021.136834">10.1016/j.physletb.2021.136834 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing transversity by measuring $螞$ polarisation in SIDIS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a>, <a href="/search/hep-ex?searchtype=author&query=Chung%2C+S+-">S. -U. Chung</a> , et al. (175 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.13585v2-abstract-short" style="display: inline;"> Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these functions were originally proposed. One candidate is the measurement of the p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.13585v2-abstract-full').style.display = 'inline'; document.getElementById('2104.13585v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.13585v2-abstract-full" style="display: none;"> Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these functions were originally proposed. One candidate is the measurement of the polarisation of $螞$ hyperons produced in SIDIS off transversely polarised nucleons, where the transverse polarisation of the struck quark might be transferred to the final-state hyperon. In this article, we present the COMPASS results on the transversity-induced polarisation of $螞$ and $\bar螞$ hyperons produced in SIDIS off transversely polarised protons. Within the experimental uncertainties, no significant deviation from zero was observed. The results are discussed in the context of different models taking into account previous experimental results on $h_1^u$ and $h_1^d$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.13585v2-abstract-full').style.display = 'none'; document.getElementById('2104.13585v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2021-072 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.13585">arXiv:2102.13585</a> <span> [<a href="https://arxiv.org/pdf/2102.13585">pdf</a>, <a href="https://arxiv.org/format/2102.13585">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.127.162001">10.1103/PhysRevLett.127.162001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^\uparrow+p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a> , et al. (286 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.13585v2-abstract-short" style="display: inline;"> Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in $p^\uparrow+p$ collisions at $\sqrt{s}=200$ GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). Because direct photons in particular are produced from the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.13585v2-abstract-full').style.display = 'inline'; document.getElementById('2102.13585v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.13585v2-abstract-full" style="display: none;"> Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in $p^\uparrow+p$ collisions at $\sqrt{s}=200$ GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). Because direct photons in particular are produced from the hard scattering and do not interact via the strong force, this measurement is a clean probe of initial-state spin-momentum correlations inside the proton and is in particular sensitive to gluon interference effects within the proton. This is the first time direct photons have been used as a probe of spin-momentum correlations at RHIC. The uncertainties on the results are a fifty-fold improvement with respect to those of the one prior measurement for the same observable, from the Fermilab E704 experiment. These results constrain gluon spin-momentum correlations in transversely polarized protons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.13585v2-abstract-full').style.display = 'none'; document.getElementById('2102.13585v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">312 authors from 68 institutions, 8 pages, 2 figures, 1 table, 2015 data. v2 is version accepted by Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.14187">arXiv:2011.14187</a> <span> [<a href="https://arxiv.org/pdf/2011.14187">pdf</a>, <a href="https://arxiv.org/format/2011.14187">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.032007">10.1103/PhysRevD.103.032007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse momentum dependent forward neutron single spin asymmetries in transversely polarized $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a> , et al. (289 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.14187v2-abstract-short" style="display: inline;"> In 2015, the PHENIX collaboration has measured very forward ($畏>6.8$) single-spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus collisions at a center of mass energy of 200 GeV. A previous publication from this data set concentrated on the nuclear dependence of such asymmetries. In this measurement the explicit transverse-momentum dependence of inclus… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.14187v2-abstract-full').style.display = 'inline'; document.getElementById('2011.14187v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.14187v2-abstract-full" style="display: none;"> In 2015, the PHENIX collaboration has measured very forward ($畏>6.8$) single-spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus collisions at a center of mass energy of 200 GeV. A previous publication from this data set concentrated on the nuclear dependence of such asymmetries. In this measurement the explicit transverse-momentum dependence of inclusive neutron single spin asymmetries for proton-proton collisions is extracted using a bootstrapping-unfolding technique on the transverse momenta. This explicit transverse-momentum dependence will help improve the understanding of the mechanisms that create these asymmetries. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.14187v2-abstract-full').style.display = 'none'; document.getElementById('2011.14187v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">314 authors from 66 institutions, 8 pages, 3 figures, 1 table, 2015 data. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 032007 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.14170">arXiv:2011.14170</a> <span> [<a href="https://arxiv.org/pdf/2011.14170">pdf</a>, <a href="https://arxiv.org/format/2011.14170">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.052009">10.1103/PhysRevD.103.052009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse single-spin asymmetries of midrapidity $蟺^0$ and $畏$ mesons in polarized $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Bichon%2C+L">L. Bichon</a>, <a href="/search/hep-ex?searchtype=author&query=Blankenship%2C+B">B. Blankenship</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Borisov%2C+V">V. Borisov</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a> , et al. (289 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.14170v2-abstract-short" style="display: inline;"> We present a measurement of the transverse single-spin asymmetry for $蟺^0$ and $畏$ mesons in $p^\uparrow$$+$$p$ collisions in the pseudorapidity range $|畏|<0.35$ and at a center-of-mass energy of 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. In comparison with previous measurements in this kinematic region, these results have a factor of 3 smaller uncertainties. As hadro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.14170v2-abstract-full').style.display = 'inline'; document.getElementById('2011.14170v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.14170v2-abstract-full" style="display: none;"> We present a measurement of the transverse single-spin asymmetry for $蟺^0$ and $畏$ mesons in $p^\uparrow$$+$$p$ collisions in the pseudorapidity range $|畏|<0.35$ and at a center-of-mass energy of 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. In comparison with previous measurements in this kinematic region, these results have a factor of 3 smaller uncertainties. As hadrons, $蟺^0$ and $畏$ mesons are sensitive to both initial- and final-state nonperturbative effects for a mix of parton flavors. Comparisons of the differences in their transverse single-spin asymmetries have the potential to disentangle the possible effects of strangeness, isospin, or mass. These results can constrain the twist-3 trigluon collinear correlation function as well as the gluon Sivers function. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.14170v2-abstract-full').style.display = 'none'; document.getElementById('2011.14170v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">314 authors from 66 institutions, 10 pages, 5 figures, 2 tables, 2015 data. v2 is version accepted for publication in Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 052009 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.03271">arXiv:2009.03271</a> <span> [<a href="https://arxiv.org/pdf/2009.03271">pdf</a>, <a href="https://arxiv.org/format/2009.03271">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-020-08740-y">10.1140/epjc/s10052-020-08740-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin Density Matrix Elements in Exclusive $蠅$ Meson Muoproduction $^*$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a> , et al. (176 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.03271v3-abstract-short" style="display: inline;"> We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $蠅$ meson muoproduction on the proton at COMPASS using 160 GeV/$c$ polarised $ 渭^{+}$ and $ 渭^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the range 5.0 GeV/$c^2$ $< W <$ 17.0 GeV/$c^2$, with the average kinematics $\langle Q^{2} \rangle=$ 2.1 (GeV/$c$)$^2$, $\langle W \rangle= 7.6$ GeV… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.03271v3-abstract-full').style.display = 'inline'; document.getElementById('2009.03271v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.03271v3-abstract-full" style="display: none;"> We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $蠅$ meson muoproduction on the proton at COMPASS using 160 GeV/$c$ polarised $ 渭^{+}$ and $ 渭^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the range 5.0 GeV/$c^2$ $< W <$ 17.0 GeV/$c^2$, with the average kinematics $\langle Q^{2} \rangle=$ 2.1 (GeV/$c$)$^2$, $\langle W \rangle= 7.6$ GeV/$c^2$, and $\langle p^{2}_{\rm T} \rangle = 0.16$ (GeV/$c$)$^2$. Here, $Q^2$ denotes the virtuality of the exchanged photon, $W$ the mass of the final hadronic system and $p_T$ the transverse momentum of the $蠅$ meson with respect to the virtual-photon direction. The measured non-zero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons ($纬^*_T \to V_L$) indicate a violation of $s$-channel helicity conservation. Additionally, we observe a sizeable contribution of unnatural-parity-exchange (UPE) transitions that decreases with increasing $W$. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow to evaluate in a model-dependent way the contribution of UPE transitions and assess the role of parton helicity-flip GPDs in exclusive $蠅$ production. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.03271v3-abstract-full').style.display = 'none'; document.getElementById('2009.03271v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">31 pages, 12 figures, 1 appendix</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-169 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.05342">arXiv:2006.05342</a> <span> [<a href="https://arxiv.org/pdf/2006.05342">pdf</a>, <a href="https://arxiv.org/format/2006.05342">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.127.082501">10.1103/PhysRevLett.127.082501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Triangle Singularity as the Origin of the $a_1(1420)$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/hep-ex?searchtype=author&query=Chumakov%2C+A+G">A. G. Chumakov</a> , et al. (173 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.05342v3-abstract-short" style="display: inline;"> The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_1(1420)$, decaying to $f_0(980)蟺$. With a mass too close to and a width smaller than the axial-vector ground state $a_1(1260)$, it was immediately interpreted as a new light exotic meson, similar to the $X$, $Y$, $Z$ states in the hidden-charm sector. We show that a resonance-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.05342v3-abstract-full').style.display = 'inline'; document.getElementById('2006.05342v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.05342v3-abstract-full" style="display: none;"> The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_1(1420)$, decaying to $f_0(980)蟺$. With a mass too close to and a width smaller than the axial-vector ground state $a_1(1260)$, it was immediately interpreted as a new light exotic meson, similar to the $X$, $Y$, $Z$ states in the hidden-charm sector. We show that a resonance-like signal fully matching the experimental data is produced by the decay of the $a_1(1260)$ resonance into $K^\ast(\to K蟺)\bar{K}$ and subsequent rescattering through a triangle singularity into the coupled $f_0(980)蟺$ channel. The amplitude for this process is calculated using a new approach based on dispersion relations. The triangle-singularity model is fitted to the partial-wave data of the COMPASS experiment. Despite having less parameters, this fit shows a slightly better quality than the one using a resonance hypothesis and thus eliminates the need for an additional resonance in order to describe the data. We thereby demonstrate for the first time in the light-meson sector that a resonance-like structure in the experimental data can be described by rescattering through a triangle singularity, providing evidence for a genuine three-body effect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.05342v3-abstract-full').style.display = 'none'; document.getElementById('2006.05342v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-104 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 127, 082501 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.11791">arXiv:2003.11791</a> <span> [<a href="https://arxiv.org/pdf/2003.11791">pdf</a>, <a href="https://arxiv.org/format/2003.11791">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135600">10.1016/j.physletb.2020.135600 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Antiproton over proton and K$^-$ over K$^+$ multiplicity ratios at high $z$ in DIS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/hep-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a> , et al. (174 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.11791v1-abstract-short" style="display: inline;"> The $\bar{\rm p} $ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energy, $z>0.5$. The data were obtained by the COMPASS Collaboration using a 160 GeV muon beam impinging on an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2$ > 1 (GeV/$c$)$^2$… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.11791v1-abstract-full').style.display = 'inline'; document.getElementById('2003.11791v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.11791v1-abstract-full" style="display: none;"> The $\bar{\rm p} $ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energy, $z>0.5$. The data were obtained by the COMPASS Collaboration using a 160 GeV muon beam impinging on an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2$ > 1 (GeV/$c$)$^2$ for the photon virtuality and $W > 5$ GeV/$c^2$ for the invariant mass of the produced hadronic system. The range in Bjorken-$x$ is restricted to $0.01 < x < 0.40$. Protons and antiprotons are identified in the momentum range $20 梅60$ GeV/$c$. In the whole studied $z$-region, the $\bar{\rm p}$ over p multiplicity ratio is found to be below the lower limit expected from calculations based on leading-order perturbative Quantum Chromodynamics (pQCD). Extending our earlier analysis of the K$^-$ over K$^+$ multiplicity ratio by including now events with larger virtual-photon energies, this ratio becomes closer to the expectation of next-to-leading order pQCD. The results of both analyses strengthen our earlier conclusion that the phase space available for hadronisation should be taken into account in the pQCD formalism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.11791v1-abstract-full').style.display = 'none'; document.getElementById('2003.11791v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 7 figures, 3 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-041 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.10322">arXiv:1912.10322</a> <span> [<a href="https://arxiv.org/pdf/1912.10322">pdf</a>, <a href="https://arxiv.org/format/1912.10322">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nuclphysb.2020.115039">10.1016/j.nuclphysb.2020.115039 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a> , et al. (182 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.10322v1-abstract-short" style="display: inline;"> Hadron leptoproduction in Semi-Inclusive measurements of Deep-Inelastic Scattering (SIDIS) on unpolarised nucleons allows one to get information on the intrinsic transverse momentum of quarks in a nucleon and on the Boer-Mulders function through the measurement of azimuthal modulations in the cross section. These modulations were recently measured by the HERMES experiment at DESY on proton and deu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.10322v1-abstract-full').style.display = 'inline'; document.getElementById('1912.10322v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.10322v1-abstract-full" style="display: none;"> Hadron leptoproduction in Semi-Inclusive measurements of Deep-Inelastic Scattering (SIDIS) on unpolarised nucleons allows one to get information on the intrinsic transverse momentum of quarks in a nucleon and on the Boer-Mulders function through the measurement of azimuthal modulations in the cross section. These modulations were recently measured by the HERMES experiment at DESY on proton and deuteron targets, and by the COMPASS experiment using the CERN SPS muon beam and a $^6$LiD target. In both cases, the amplitudes of the $\cos蠁_h$ and $\cos 2蠁_h$ modulations show strong kinematic dependences for both positive and negative hadrons. It has been known since some time that the measured final-state hadrons in those SIDIS experiments receive a contribution from exclusive diffractive production of vector mesons, particularly important at large values of $z$, the fraction of the virtual photon energy carried by the hadron. In previous measurements of azimuthal asymmetries this contribution was not taken into account, because it was not known that it could distort the azimuthal modulations. Presently, a method to evaluate the contribution of the exclusive reactions to the azimuthal asymmetries measured by COMPASS has been developed. The subtraction of this contribution results in a better understanding of the kinematic effects, and the remaining non-zero $\cos 2蠁_h$ modulation gives indication for a non-zero Boer-Mulders effect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.10322v1-abstract-full').style.display = 'none'; document.getElementById('1912.10322v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2019-286 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.14487">arXiv:1910.14487</a> <span> [<a href="https://arxiv.org/pdf/1910.14487">pdf</a>, <a href="https://arxiv.org/format/1910.14487">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.014902">10.1103/PhysRevC.102.014902 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $J/蠄$ at forward and backward rapidity in $p$+$p$, $p$$+A$l, $p$$+A$u, and $^3$He+Au collisions at $\sqrt{s_{_{NN}}}=200~{\rm GeV}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U+A">U. A. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Beckman%2C+S">S. Beckman</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a> , et al. (337 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1910.14487v3-abstract-short" style="display: inline;"> Charmonium is a valuable probe in heavy-ion collisions to study the properties of the quark gluon plasma, and is also an interesting probe in small collision systems to study cold nuclear matter effects, which are also present in large collision systems. With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of charmon… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.14487v3-abstract-full').style.display = 'inline'; document.getElementById('1910.14487v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.14487v3-abstract-full" style="display: none;"> Charmonium is a valuable probe in heavy-ion collisions to study the properties of the quark gluon plasma, and is also an interesting probe in small collision systems to study cold nuclear matter effects, which are also present in large collision systems. With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of charmonium in small systems have become increasingly relevant. We present the results of $J/蠄$ measurements at forward and backward rapidity in various small collision systems, $p$$+$$p$, $p$$+$Al, $p$$+$Au and $^3$He$+$Au, at $\sqrt{s_{_{NN}}}$=200 GeV. The results are presented in the form of the observable $R_{AB}$, the nuclear modification factor, a measure of the ratio of the $J/蠄$ invariant yield compared to the scaled yield in $p$$+$$p$ collisions. We examine the rapidity, transverse momentum, and collision centrality dependence of nuclear effects on $J/蠄$ production with different projectile sizes $p$ and $^3$He, and different target sizes Al and Au. The modification is found to be strongly dependent on the target size, but to be very similar for $p$$+$Au and $^{3}$He$+$Au. However, for 0%--20% central collisions at backward rapidity, the modification for $^{3}$He$+$Au is found to be smaller than that for $p$$+$Au, with a mean fit to the ratio of $0.89\pm0.03$(stat)${\pm}0.08$(syst), possibly indicating final state effects due to the larger projectile size. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.14487v3-abstract-full').style.display = 'none'; document.getElementById('1910.14487v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">362 authors, 68 institutions, 23 pages, 28 figures, 3 tables, 2014 and 2015 data. v3 is version accepted for publication in Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 014902 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.08218">arXiv:1907.08218</a> <span> [<a href="https://arxiv.org/pdf/1907.08218">pdf</a>, <a href="https://arxiv.org/format/1907.08218">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/i2019-12885-0">10.1140/epja/i2019-12885-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pion and Kaon Structure at the Electron-Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aguilar%2C+A+C">Arlene C. Aguilar</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+Z">Zafir Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">Christine Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+S">Salina Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">Vincent Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Arrington%2C+J">John Arrington</a>, <a href="/search/hep-ex?searchtype=author&query=Bashir%2C+A">Adnan Bashir</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+V">Vladimir Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Binosi%2C+D">Daniele Binosi</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+L">Lei Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C">Chen Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+M">Muyang Chen</a>, <a href="/search/hep-ex?searchtype=author&query=de+Melo%2C+J+P+B+C">Jo茫o Pacheco B. C. de Melo</a>, <a href="/search/hep-ex?searchtype=author&query=Diefenthaler%2C+M">Markus Diefenthaler</a>, <a href="/search/hep-ex?searchtype=author&query=Ding%2C+M">Minghui Ding</a>, <a href="/search/hep-ex?searchtype=author&query=Ent%2C+R">Rolf Ent</a>, <a href="/search/hep-ex?searchtype=author&query=Frederico%2C+T">Tobias Frederico</a>, <a href="/search/hep-ex?searchtype=author&query=Gao%2C+F">Fei Gao</a>, <a href="/search/hep-ex?searchtype=author&query=Gothe%2C+R+W">Ralf W. Gothe</a>, <a href="/search/hep-ex?searchtype=author&query=Hattawy%2C+M">Mohammad Hattawy</a>, <a href="/search/hep-ex?searchtype=author&query=Hobbs%2C+T+J">Timothy J. Hobbs</a>, <a href="/search/hep-ex?searchtype=author&query=Horn%2C+T">Tanja Horn</a>, <a href="/search/hep-ex?searchtype=author&query=Huber%2C+G+M">Garth M. Huber</a>, <a href="/search/hep-ex?searchtype=author&query=Jia%2C+S">Shaoyang Jia</a>, <a href="/search/hep-ex?searchtype=author&query=Keppel%2C+C">Cynthia Keppel</a> , et al. (26 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1907.08218v2-abstract-short" style="display: inline;"> Understanding the origin and dynamics of hadron structure and in turn that of atomic nuclei is a central goal of nuclear physics. This challenge entails the questions of how does the roughly 1 GeV mass-scale that characterizes atomic nuclei appear; why does it have the observed value; and, enigmatically, why are the composite Nambu-Goldstone (NG) bosons in quantum chromodynamics (QCD) abnormally l… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.08218v2-abstract-full').style.display = 'inline'; document.getElementById('1907.08218v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.08218v2-abstract-full" style="display: none;"> Understanding the origin and dynamics of hadron structure and in turn that of atomic nuclei is a central goal of nuclear physics. This challenge entails the questions of how does the roughly 1 GeV mass-scale that characterizes atomic nuclei appear; why does it have the observed value; and, enigmatically, why are the composite Nambu-Goldstone (NG) bosons in quantum chromodynamics (QCD) abnormally light in comparison? In this perspective, we provide an analysis of the mass budget of the pion and proton in QCD; discuss the special role of the kaon, which lies near the boundary between dominance of strong and Higgs mass-generation mechanisms; and explain the need for a coherent effort in QCD phenomenology and continuum calculations, in exa-scale computing as provided by lattice QCD, and in experiments to make progress in understanding the origins of hadron masses and the distribution of that mass within them. We compare the unique capabilities foreseen at the electron-ion collider (EIC) with those at the hadron-electron ring accelerator (HERA), the only previous electron-proton collider; and describe five key experimental measurements, enabled by the EIC and aimed at delivering fundamental insights that will generate concrete answers to the questions of how mass and structure arise in the pion and kaon, the Standard Model's NG modes, whose surprisingly low mass is critical to the evolution of our Universe. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.08218v2-abstract-full').style.display = 'none'; document.getElementById('1907.08218v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 12 figures, to appear in the European Physical Journal A - "Hadrons and Nuclei"</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> NJU-INP 001/19 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.09928">arXiv:1906.09928</a> <span> [<a href="https://arxiv.org/pdf/1906.09928">pdf</a>, <a href="https://arxiv.org/format/1906.09928">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.101.034910">10.1103/PhysRevC.101.034910 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nuclear-modification factor of charged hadrons at forward and backward rapidity in $p$$+$Al and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a>, <a href="/search/hep-ex?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a>, <a href="/search/hep-ex?searchtype=author&query=Chi%2C+C+Y">C. Y. Chi</a> , et al. (278 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.09928v2-abstract-short" style="display: inline;"> The PHENIX experiment has studied nuclear effects in $p$$+$Al and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV on charged hadron production at forward rapidity ($1.4<畏<2.4$, $p$-going direction) and backward rapidity ($-2.2<畏<-1.2$, $A$-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various col… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.09928v2-abstract-full').style.display = 'inline'; document.getElementById('1906.09928v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.09928v2-abstract-full" style="display: none;"> The PHENIX experiment has studied nuclear effects in $p$$+$Al and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV on charged hadron production at forward rapidity ($1.4<畏<2.4$, $p$-going direction) and backward rapidity ($-2.2<畏<-1.2$, $A$-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various collision multiplicity selections. In central $p$$+$Al and $p$$+$Au collisions, a suppression (enhancement) is observed at forward (backward) rapidity compared to the binary scaled yields in $p$+$p$ collisions. The magnitude of enhancement at backward rapidity is larger in $p$$+$Au collisions than in $p$$+$Al collisions, which have a smaller number of participating nucleons. However, the results at forward rapidity show a similar suppression within uncertainties. The results in the integrated centrality are compared with calculations using nuclear parton distribution functions, which show a reasonable agreement at the forward rapidity but fail to describe the backward rapidity enhancement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.09928v2-abstract-full').style.display = 'none'; document.getElementById('1906.09928v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">303 authors, 66 institutions, 17 pages, 15 figures, 4 tables, 2015 data. v2 is version accepted for publication by Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 101, 034910 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.12030">arXiv:1903.12030</a> <span> [<a href="https://arxiv.org/pdf/1903.12030">pdf</a>, <a href="https://arxiv.org/format/1903.12030">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135454">10.1016/j.physletb.2020.135454 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the cross section for hard exclusive $蟺^0$ leptoproduction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a>, <a href="/search/hep-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a> , et al. (178 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.12030v1-abstract-short" style="display: inline;"> We report on a measurement of hard exclusive $蟺^0$ muoproduction on the proton by COMPASS using 160 GeV/$c$ polarised $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. From the average of the measured $渭^+$ and $渭^-$ cross sections, the virtual-photon proton cross section is determined as a function of the squared four-momentum transfer between initial and final proton i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.12030v1-abstract-full').style.display = 'inline'; document.getElementById('1903.12030v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.12030v1-abstract-full" style="display: none;"> We report on a measurement of hard exclusive $蟺^0$ muoproduction on the proton by COMPASS using 160 GeV/$c$ polarised $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. From the average of the measured $渭^+$ and $渭^-$ cross sections, the virtual-photon proton cross section is determined as a function of the squared four-momentum transfer between initial and final proton in the range $0.08\,(\text{GeV/}c)^2 < |t| < 0.64\,(\text{GeV/}c)^2$. The average kinematics of the measurement are $\langle Q^2 \rangle =2.0\; {(\text{GeV}/c)^2}$, $\langle 谓\rangle = 12.8\; {\text{GeV}}$, $\langle x_{Bj} \rangle = 0.093 $ and $\langle -t \rangle = 0.256\; {(\text{GeV}/c)^2} $. Fitting the azimuthal dependence reveals a combined contribution by transversely and longitudinally polarised photons of $(8.1 \ \pm \ 0.9_{\text{stat}}{}_{- \ 1.0}^{+ \ 1.1}\big\rvert_{\text{sys}})\,{\text{nb}}/{(\text{GeV}/c)^{2}}$, as well as transverse-transverse and longitudinal-transverse interference contributions of $(-6.0 \pm 1.3_{\text{stat}}{}_{- \ 0.7}^{+ \ 0.7}\big\rvert_{\text{sys}})\,{\text{nb}}/{(\text{GeV}/c)^{2}}$ and $(1.4 \pm 0.5_{\text{stat}}{}_{- \ 0.2}^{+ \ 0.3}\big\rvert_{\text{sys}})\,{\text{nb}}/{(\text{GeV}/c)^{2}}$, respectively. Our results provide important input for modelling Generalised Parton Distributions. In the context of the phenomenological Goloskokov-Kroll model, the statistically significant transverse-transverse interference contribution constitutes clear experimental evidence for the chiral-odd GPD $\overline{E}_T$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.12030v1-abstract-full').style.display = 'none'; document.getElementById('1903.12030v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2019-049 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.07422">arXiv:1903.07422</a> <span> [<a href="https://arxiv.org/pdf/1903.07422">pdf</a>, <a href="https://arxiv.org/format/1903.07422">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.123.122001">10.1103/PhysRevLett.123.122001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nuclear dependence of the transverse single-spin asymmetry in the production of charged hadrons at forward rapidity in polarized $p+p$, $p+$Al, and $p+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a>, <a href="/search/hep-ex?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a>, <a href="/search/hep-ex?searchtype=author&query=Chi%2C+C+Y">C. Y. Chi</a> , et al. (278 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.07422v2-abstract-short" style="display: inline;"> We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively-charged hadrons in polarized $p^{\uparrow}+p$, $p^{\uparrow}+$Al and $p^{\uparrow}+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements have been performed at forward rapidity ($1.4<畏<2.4$) over the range of $1.8<p_{T}<7.0$ GeV$/c$ and $0.1<x_{F}<0.2$. We observed a positive… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.07422v2-abstract-full').style.display = 'inline'; document.getElementById('1903.07422v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.07422v2-abstract-full" style="display: none;"> We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively-charged hadrons in polarized $p^{\uparrow}+p$, $p^{\uparrow}+$Al and $p^{\uparrow}+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements have been performed at forward rapidity ($1.4<畏<2.4$) over the range of $1.8<p_{T}<7.0$ GeV$/c$ and $0.1<x_{F}<0.2$. We observed a positive asymmetry $A_{N}$ for positively-charged hadrons in \polpp collisions, and a significantly reduced asymmetry in $p^{\uparrow}$+$A$ collisions. These results reveal a nuclear dependence of charged hadron $A_N$ in a regime where perturbative techniques are relevant. These results provide new opportunities to use \polpA collisions as a tool to investigate the rich phenomena behind TSSAs in hadronic collisions and to use TSSA as a new handle in studying small-system collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.07422v2-abstract-full').style.display = 'none'; document.getElementById('1903.07422v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">303 authors from 66 institutions, 9 pages, 2 figures, 1 table. v1 is version accepted for publication in Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 122001 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.08405">arXiv:1901.08405</a> <span> [<a href="https://arxiv.org/pdf/1901.08405">pdf</a>, <a href="https://arxiv.org/format/1901.08405">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.99.092003">10.1103/PhysRevD.99.092003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of charm and bottom production from semileptonic hadron decays in $p$$+$$p$ collisions at $\sqrt{s_{NN}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a>, <a href="/search/hep-ex?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a>, <a href="/search/hep-ex?searchtype=author&query=Chi%2C+C+Y">C. Y. Chi</a> , et al. (277 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1901.08405v2-abstract-short" style="display: inline;"> Measurements of the differential production of electrons from open-heavy-flavor hadrons with charm- and bottom-quark content in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV are presented. The measurements proceed through displaced-vertex analyses of electron tracks from the semileptonic decay of charm and bottom hadrons using the PHENIX silicon-vertex detector. The relative contribution of electrons… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.08405v2-abstract-full').style.display = 'inline'; document.getElementById('1901.08405v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.08405v2-abstract-full" style="display: none;"> Measurements of the differential production of electrons from open-heavy-flavor hadrons with charm- and bottom-quark content in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV are presented. The measurements proceed through displaced-vertex analyses of electron tracks from the semileptonic decay of charm and bottom hadrons using the PHENIX silicon-vertex detector. The relative contribution of electrons from bottom decays to inclusive heavy-flavor-electron production is found to be consistent with fixed-order-plus-next-to-leading-log perturbative-QCD calculations within experimental and theoretical uncertainties. These new measurements in $p$$+$$p$ collisions provide a precision baseline for comparable forthcoming measurements in A$+$A collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.08405v2-abstract-full').style.display = 'none'; document.getElementById('1901.08405v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">302 authors from 66 institutions, 28 pages, 21 figures, 3 tables, 2015 data. v2 is version accepted for publication by Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 99, 092003 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.09045">arXiv:1809.09045</a> <span> [<a href="https://arxiv.org/pdf/1809.09045">pdf</a>, <a href="https://arxiv.org/format/1809.09045">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.99.044912">10.1103/PhysRevC.99.044912 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nonperturbative transverse momentum broadening in dihadron angular correlations in $\sqrt{s_{NN}}=200$ GeV proton-nucleus collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a>, <a href="/search/hep-ex?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a> , et al. (274 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.09045v2-abstract-short" style="display: inline;"> The PHENIX collaboration has measured high-$p_T$ dihadron correlations in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The correlations arise from inter- and intra-jet correlations and thus have sensitivity to nonperturbative effects in both the initial and final states. The distributions of $p_{\rm out}$, the transverse momentum component of the associated hadron pe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09045v2-abstract-full').style.display = 'inline'; document.getElementById('1809.09045v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.09045v2-abstract-full" style="display: none;"> The PHENIX collaboration has measured high-$p_T$ dihadron correlations in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The correlations arise from inter- and intra-jet correlations and thus have sensitivity to nonperturbative effects in both the initial and final states. The distributions of $p_{\rm out}$, the transverse momentum component of the associated hadron perpendicular to the trigger hadron, are sensitive to initial and final state transverse momenta. These distributions are measured multi-differentially as a function of $x_E$, the longitudinal momentum fraction of the associated hadron with respect to the trigger hadron. The near-side $p_{\rm out}$ widths, sensitive to fragmentation transverse momentum, show no significant broadening between $p$$+$Au, $p$$+$Al, and $p$$+$$p$. The away-side nonperturbative $p_{\rm out}$ widths are found to be broadened in $p$$+$Au when compared to $p$$+$$p$; however, there is no significant broadening in $p$$+$Al compared to $p$$+$$p$ collisions. The data also suggest that the away-side $p_{\rm out}$ broadening is a function of $N_{\rm coll}$, the number of binary nucleon-nucleon collisions, in the interaction. The potential implications of these results with regard to initial and final state transverse momentum broadening and energy loss of partons in a nucleus, among other nuclear effects, are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09045v2-abstract-full').style.display = 'none'; document.getElementById('1809.09045v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">299 authors from 64 institutions, 10 pages, 6 figures, 1 table. v2 is version accepted for publication in Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 99, 044912 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.02936">arXiv:1809.02936</a> <span> [<a href="https://arxiv.org/pdf/1809.02936">pdf</a>, <a href="https://arxiv.org/format/1809.02936">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nuclphysb.2018.12.024">10.1016/j.nuclphysb.2018.12.024 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $P_T$-weighted Sivers asymmetries in leptoproduction of hadrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barone%2C+V">V. Barone</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a> , et al. (188 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.02936v1-abstract-short" style="display: inline;"> The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_T$, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.02936v1-abstract-full').style.display = 'inline'; document.getElementById('1809.02936v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.02936v1-abstract-full" style="display: none;"> The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_T$, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of $P_T$-weighted Sivers asymmetries, which are both proportional to the product of the firsttransverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for $u$ and $d$ quarks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.02936v1-abstract-full').style.display = 'none'; document.getElementById('1809.02936v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 12 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-242 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.00848">arXiv:1808.00848</a> <span> [<a href="https://arxiv.org/pdf/1808.00848">pdf</a>, <a href="https://arxiv.org/format/1808.00848">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Letter of Intent: A New QCD facility at the M2 beam line of the CERN SPS (COMPASS++/AMBER) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adams%2C+B">B. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C+A">C. A. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Azhibekov%2C+A">A. Azhibekov</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/hep-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (242 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1808.00848v6-abstract-short" style="display: inline;"> A New QCD facility at the M2 beam line of the CERN SPS COMPASS++/AMBER </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.00848v6-abstract-full" style="display: none;"> A New QCD facility at the M2 beam line of the CERN SPS COMPASS++/AMBER <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.00848v6-abstract-full').style.display = 'none'; document.getElementById('1808.00848v6-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">91 pages, 51 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-SPSC-2019-003 (SPSC-I-250) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.11928">arXiv:1807.11928</a> <span> [<a href="https://arxiv.org/pdf/1807.11928">pdf</a>, <a href="https://arxiv.org/format/1807.11928">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.121.222301">10.1103/PhysRevLett.121.222301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pseudorapidity dependence of particle production and elliptic flow in asymmetric nuclear collisions of $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+K">K. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayuso%2C+C">C. Ayuso</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Beckman%2C+S">S. Beckman</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a> , et al. (343 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1807.11928v2-abstract-short" style="display: inline;"> Asymmetric nuclear collisions of $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au at $\sqrt{s_{_{NN}}}=200$ GeV provide an excellent laboratory for understanding particle production, as well as exploring interactions among these particles after their initial creation in the collision. We present measurements of charged hadron production $dN_{\rm ch}/d畏$ in all such collision systems over a broad ps… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.11928v2-abstract-full').style.display = 'inline'; document.getElementById('1807.11928v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.11928v2-abstract-full" style="display: none;"> Asymmetric nuclear collisions of $p$$+$Al, $p$$+$Au, $d$$+$Au, and $^{3}$He$+$Au at $\sqrt{s_{_{NN}}}=200$ GeV provide an excellent laboratory for understanding particle production, as well as exploring interactions among these particles after their initial creation in the collision. We present measurements of charged hadron production $dN_{\rm ch}/d畏$ in all such collision systems over a broad pseudorapidity range and as a function of collision multiplicity. A simple wounded quark model is remarkably successful at describing the full data set. We also measure the elliptic flow $v_{2}$ over a similarly broad pseudorapidity range. These measurements provide key constraints on models of particle emission and their translation into flow. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.11928v2-abstract-full').style.display = 'none'; document.getElementById('1807.11928v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">368 authors, 7 pages, 4 figures. v2 is the version accepted for publication by Physical Review Letters. Plain text data tables for points plotted in figures for this and other PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 121, 222301 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.04075">arXiv:1805.04075</a> <span> [<a href="https://arxiv.org/pdf/1805.04075">pdf</a>, <a href="https://arxiv.org/format/1805.04075">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Correlations of $渭渭$, $e渭$, and $ee$ pairs in $p$+$p$ collisions at $\sqrt{s}=200$ GeV and implications for $c\bar{c}$ and $b\bar{b}$ production mechanisms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bagoly%2C+A">A. Bagoly</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a> , et al. (269 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.04075v1-abstract-short" style="display: inline;"> PHENIX has measured the azimuthal correlations of muon pairs from charm and bottom semi-leptonic decays in $p$+$p$ collisions at $\sqrt{s}=200$ GeV, using a novel analysis technique utilizing both unlike- and like-sign muon pairs to separate charm, bottom and Drell-Yan contributions. The dimuon measurements combined with the previous electron-muon and dielectron measurements span a wide range in r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.04075v1-abstract-full').style.display = 'inline'; document.getElementById('1805.04075v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.04075v1-abstract-full" style="display: none;"> PHENIX has measured the azimuthal correlations of muon pairs from charm and bottom semi-leptonic decays in $p$+$p$ collisions at $\sqrt{s}=200$ GeV, using a novel analysis technique utilizing both unlike- and like-sign muon pairs to separate charm, bottom and Drell-Yan contributions. The dimuon measurements combined with the previous electron-muon and dielectron measurements span a wide range in rapidity, and are well described by PYTHIA Tune A. Through a Bayesian analysis based on PYTHIA Tune A, we show that leading order pair creation is the dominant $(76\%\pm^{14}_{19}\%)$ contribution for $b\bar{b}$ production, whereas the data favor the scenario in which next-to-leading-order processes dominate $c\bar{c}$ production. The small contribution of next-to-leading-order processes in $b\bar{b}$ production at the collision energies of the Relativistic Heavy Ion Collider contrasts with the case at Large-Hadron-Collider energies, where next-to-leading-order processes are expected to dominate. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.04075v1-abstract-full').style.display = 'none'; document.getElementById('1805.04075v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">294 authors from 64 institutions, 7 pages, 3 figures. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.02450">arXiv:1805.02450</a> <span> [<a href="https://arxiv.org/pdf/1805.02450">pdf</a>, <a href="https://arxiv.org/format/1805.02450">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.98.072004">10.1103/PhysRevD.98.072004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p+p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bagoly%2C+A">A. Bagoly</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a> , et al. (270 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.02450v2-abstract-short" style="display: inline;"> Dihadron and isolated direct photon-hadron angular correlations are measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV. The correlations are sensitive to nonperturbative initial-state and final-state transverse momentum $k_T$ and $j_T$ in the azimuthal nearly back-to-back region $螖蠁\sim蟺$. In this region, transverse-momentum-dependent evolution can be studied when several different hard scales… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.02450v2-abstract-full').style.display = 'inline'; document.getElementById('1805.02450v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.02450v2-abstract-full" style="display: none;"> Dihadron and isolated direct photon-hadron angular correlations are measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV. The correlations are sensitive to nonperturbative initial-state and final-state transverse momentum $k_T$ and $j_T$ in the azimuthal nearly back-to-back region $螖蠁\sim蟺$. In this region, transverse-momentum-dependent evolution can be studied when several different hard scales are measured. To have sensitivity to small transverse momentum scales, nonperturbative momentum widths of $p_{\rm out}$, the out-of-plane transverse momentum component perpendicular to the trigger particle, are measured. These widths are used to investigate possible effects from transverse-momentum-dependent factorization breaking. When accounting for the longitudinal momentum fraction of the away-side hadron with respect to the near-side trigger particle, the widths are found to increase with the hard scale; this is qualitatively similar to the observed behavior in Drell-Yan and semi-inclusive deep-inelastic scattering interactions. The momentum widths are also studied as a function of center-of-mass energy by comparing to previous measurements at $\sqrt{s}=510$ GeV. The nonperturbative jet widths also appear to increase with $\sqrt{s}$ at a similar $x_T$, which is qualitatively consistent to similar measurements in Drell-Yan interactions. To quantify the magnitude of any transverse-momentum-dependent factorization breaking effects, calculations will need to be performed to compare to these measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.02450v2-abstract-full').style.display = 'none'; document.getElementById('1805.02450v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">295 authors from 64 institutions, 13 pages, 11 figures, 2 tables. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 98, 072004 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.02448">arXiv:1805.02448</a> <span> [<a href="https://arxiv.org/pdf/1805.02448">pdf</a>, <a href="https://arxiv.org/format/1805.02448">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.99.072003">10.1103/PhysRevD.99.072003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of $渭渭$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bagoly%2C+A">A. Bagoly</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a> , et al. (268 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.02448v2-abstract-short" style="display: inline;"> PHENIX reports differential cross sections of $渭渭$ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV at forward and backward rapidity ($1.2<|畏|<2.2$). The $渭渭$ pairs from $c\bar{c}$, $b\bar{b}$, and Drell-Yan are separated using a template fit to unlike- and like-sign muon pair spectra in mass and $p_T$. The az… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.02448v2-abstract-full').style.display = 'inline'; document.getElementById('1805.02448v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.02448v2-abstract-full" style="display: none;"> PHENIX reports differential cross sections of $渭渭$ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV at forward and backward rapidity ($1.2<|畏|<2.2$). The $渭渭$ pairs from $c\bar{c}$, $b\bar{b}$, and Drell-Yan are separated using a template fit to unlike- and like-sign muon pair spectra in mass and $p_T$. The azimuthal opening angle correlation between the muons from $c\bar{c}$ and $b\bar{b}$ decays and the pair-$p_T$ distributions are compared to distributions generated using {\sc pythia} and {\sc powheg} models, which both include next-to-leading order processes. The measured distributions for pairs from $c\bar{c}$ are consistent with {\sc pythia} calculations. The $c\bar{c}$ data presents narrower azimuthal correlations and softer $p_T$ distributions compared to distributions generated from {\sc powheg}. The $b\bar{b}$ data are well described by both models. The extrapolated total cross section for bottom production is $3.75{\pm}0.24({\rm stat}){\pm}^{0.35}_{0.50}({\rm syst}){\pm}0.45({\rm global})$[$渭$b], which is consistent with previous measurements at the Relativistic Heavy Ion Collider in the same system at the same collision energy, and is approximately a factor of two higher than the central value calculated with theoretical models. The measured Drell-Yan cross section is in good agreement with next-to-leading-order quantum-chromodynamics calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.02448v2-abstract-full').style.display = 'none'; document.getElementById('1805.02448v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">293 authors from 64 institutions, 42 pages, 36 figures, 13 tables. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 99, 072003 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.01491">arXiv:1805.01491</a> <span> [<a href="https://arxiv.org/pdf/1805.01491">pdf</a>, <a href="https://arxiv.org/format/1805.01491">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.98.012006">10.1103/PhysRevD.98.012006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Single-spin asymmetry of $J/蠄$ production in $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions with transversely polarized proton beams at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bagoly%2C+A">A. Bagoly</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+M+L">M. L. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Bryslawskyj%2C+J">J. Bryslawskyj</a>, <a href="/search/hep-ex?searchtype=author&query=Bumazhnov%2C+V">V. Bumazhnov</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+S">S. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Roman%2C+V+C">V. Canoa Roman</a> , et al. (268 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.01491v2-abstract-short" style="display: inline;"> We report the transverse single-spin asymmetries of $J/蠄$ production at forward and backward rapidity, $1.2<|y|<2.2$, as a function of $J/蠄$ transverse momentum ($p_T$) and Feynman-$x$ ($x_F$). The data analyzed were recorded by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2015 from $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions with transversely polarized proton beams at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.01491v2-abstract-full').style.display = 'inline'; document.getElementById('1805.01491v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.01491v2-abstract-full" style="display: none;"> We report the transverse single-spin asymmetries of $J/蠄$ production at forward and backward rapidity, $1.2<|y|<2.2$, as a function of $J/蠄$ transverse momentum ($p_T$) and Feynman-$x$ ($x_F$). The data analyzed were recorded by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2015 from $p$$+$$p$, $p$$+$Al, and $p$$+$Au collisions with transversely polarized proton beams at $\sqrt{s_{_{NN}}}=200$ GeV. At this collision energy, single-spin asymmetries for heavy-flavor particle production of $p$$+$$p$ collisions provide access to the spin-dependent gluon distribution and higher-twist correlation functions inside the nucleon, such as the gluon Qiu-Sterman and trigluon correlation functions. Proton+nucleus collisions offer an excellent opportunity to study nuclear effects on the correlation functions. The data indicate negative asymmetries at the two-standard-deviation level in the $p$$+$Au data for $p_T<2$ GeV/$c$ at both forward and backward rapidity, while in $p$$+$$p$ and $p$$+$Al collisions the asymmetries are consistent with zero within the range of experimental uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.01491v2-abstract-full').style.display = 'none'; document.getElementById('1805.01491v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">294 authors from 64 institutions, 11 pages, 5 figures, and 4 tables. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 98, 012006 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.05913">arXiv:1802.05913</a> <span> [<a href="https://arxiv.org/pdf/1802.05913">pdf</a>, <a href="https://arxiv.org/format/1802.05913">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.98.092003">10.1103/PhysRevD.98.092003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Light isovector resonances in $蟺^- p \to 蟺^-蟺^-蟺^+ p$ at 190 GeV/${\it c}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a> , et al. (200 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.05913v2-abstract-short" style="display: inline;"> We have performed the most comprehensive resonance-model fit of $蟺^-蟺^-蟺^+$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction $蟺^- + p \to 蟺^-蟺^-蟺^+ + p_\text{recoil}$ with a 190 GeV/$c$ pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, $0.5 < m_{3蟺} < 2.5$ GeV/… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.05913v2-abstract-full').style.display = 'inline'; document.getElementById('1802.05913v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.05913v2-abstract-full" style="display: none;"> We have performed the most comprehensive resonance-model fit of $蟺^-蟺^-蟺^+$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction $蟺^- + p \to 蟺^-蟺^-蟺^+ + p_\text{recoil}$ with a 190 GeV/$c$ pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, $0.5 < m_{3蟺} < 2.5$ GeV/$c^2$, and simultaneously in 11 bins of the reduced four-momentum transfer squared, $0.1 < t' < 1.0$ $($GeV$/c)^2$, are subjected to a resonance-model fit using Breit-Wigner amplitudes to simultaneously describe a subset of 14 selected waves using 11 isovector light-meson states with $J^{PC} = 0^{-+}$, $1^{++}$, $2^{++}$, $2^{-+}$, $4^{++}$, and spin-exotic $1^{-+}$ quantum numbers. The model contains the well-known resonances $蟺(1800)$, $a_1(1260)$, $a_2(1320)$, $蟺_2(1670)$, $蟺_2(1880)$, and $a_4(2040)$. In addition, it includes the disputed $蟺_1(1600)$, the excited states $a_1(1640)$, $a_2(1700)$, and $蟺_2(2005)$, as well as the resonancelike $a_1(1420)$. We measure the resonance parameters mass and width of these objects by combining the information from the PWA results obtained in the 11 $t'$ bins. We extract the relative branching fractions of the $蟻(770) 蟺$ and $f_2(1270) 蟺$ decays of $a_2(1320)$ and $a_4(2040)$, where the former one is measured for the first time. In a novel approach, we extract the $t'$ dependence of the intensity of the resonances and of their phases. The $t'$ dependence of the intensities of most resonances differs distinctly from the $t'$ dependence of the nonresonant components. For the first time, we determine the $t'$ dependence of the phases of the production amplitudes and confirm that the production mechanism of the Pomeron exchange is common to all resonances. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.05913v2-abstract-full').style.display = 'none'; document.getElementById('1802.05913v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">224 pages, 172 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-021 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 98, 092003 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.02739">arXiv:1802.02739</a> <span> [<a href="https://arxiv.org/pdf/1802.02739">pdf</a>, <a href="https://arxiv.org/format/1802.02739">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.04.038">10.1016/j.physletb.2019.04.038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a> , et al. (202 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.02739v2-abstract-short" style="display: inline;"> We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $渭^+$ and $渭^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.02739v2-abstract-full').style.display = 'inline'; document.getElementById('1802.02739v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.02739v2-abstract-full" style="display: none;"> We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $渭^+$ and $渭^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the final final proton. The slope $B$ of the $t$-dependence is fitted with a single exponential function, which yields $B=(4.3 \ \pm \ 0.6_{\text{stat}}\_{- \ 0.3}^{+ \ 0.1}\big\rvert_{\text{sys}}) (\text{GeV}/c)^{-2}$. This result can be converted into an average transverse extension of partons in the proton, $\sqrt{\langle r_{\perp}^2 \rangle} = (0.58 \ \pm \ 0.04_{\text{stat}}\_{- \ 0.02}^{+ \ 0.01}\big\rvert_{\text{sys}})\text{fm}$. For this measurement, the average virtuality of the photon mediating the interaction is $\langle Q^2 \rangle = 1.8\,(\text{GeV/}c)^2$ and the average value of the Bjorken variable is $\langle x_{\text{Bj}} \rangle = 0.056$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.02739v2-abstract-full').style.display = 'none'; document.getElementById('1802.02739v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-016 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.00584">arXiv:1802.00584</a> <span> [<a href="https://arxiv.org/pdf/1802.00584">pdf</a>, <a href="https://arxiv.org/format/1802.00584">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.09.052">10.1016/j.physletb.2018.09.052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> K$^{-}$ over K$^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/hep-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/hep-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/hep-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a> , et al. (186 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.00584v2-abstract-short" style="display: inline;"> The K$^{-}$ over K$^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2>1$ (GeV/$c)^2$ for the photon virtuality and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.00584v2-abstract-full').style.display = 'inline'; document.getElementById('1802.00584v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.00584v2-abstract-full" style="display: none;"> The K$^{-}$ over K$^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2>1$ (GeV/$c)^2$ for the photon virtuality and $W>5$ GeV/$c^2$ for the invariant mass of the produced hadronic system. Kaons are identified in the momentum range from 12 GeV/$c$ to 40 GeV/$c$, thereby restricting the range in Bjorken-$x$ to $0.01<x<0.40$. The $z$-dependence of the multiplicity ratio is studied for $z>0.75$. For very large values of $z$, $i.e.$ $z>0.8$, we observe the kaon multiplicity ratio to fall below the lower limits expected from calculations based on leading and next-to-leading order perturbative quantum chromodynamics. Also, the kaon multiplicity ratio shows a strong dependence on the missing mass of the single-kaon production process. This suggests that within the perturbative quantum chromodynamics formalism an additional correction may be required, which takes into account the phase space available for hadronisation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.00584v2-abstract-full').style.display = 'none'; document.getElementById('1802.00584v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-012 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.09736">arXiv:1710.09736</a> <span> [<a href="https://arxiv.org/pdf/1710.09736">pdf</a>, <a href="https://arxiv.org/format/1710.09736">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.97.064904">10.1103/PhysRevC.97.064904 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of mass-dependent azimuthal anisotropy in central $p$$+$Au, $d$$+$Au, and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Adare%2C+A">A. Adare</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bagoly%2C+A">A. Bagoly</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a>, <a href="/search/hep-ex?searchtype=author&query=Bazilevsky%2C+A">A. Bazilevsky</a>, <a href="/search/hep-ex?searchtype=author&query=Beaumier%2C+M">M. Beaumier</a>, <a href="/search/hep-ex?searchtype=author&query=Beckman%2C+S">S. Beckman</a>, <a href="/search/hep-ex?searchtype=author&query=Belmont%2C+R">R. Belmont</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+A">A. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Berdnikov%2C+Y">Y. Berdnikov</a>, <a href="/search/hep-ex?searchtype=author&query=Blau%2C+D+S">D. S. Blau</a>, <a href="/search/hep-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/hep-ex?searchtype=author&query=Bok%2C+J+S">J. S. Bok</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.09736v2-abstract-short" style="display: inline;"> We present measurements of the transverse-momentum dependence of elliptic flow $v_2$ for identified pions and (anti)protons at midrapidity ($|畏|<0.35$), in 0%--5% central $p$$+$Au and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. When taken together with previously published measurements in $d$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV, the results cover a broad range of small-collisio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.09736v2-abstract-full').style.display = 'inline'; document.getElementById('1710.09736v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.09736v2-abstract-full" style="display: none;"> We present measurements of the transverse-momentum dependence of elliptic flow $v_2$ for identified pions and (anti)protons at midrapidity ($|畏|<0.35$), in 0%--5% central $p$$+$Au and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. When taken together with previously published measurements in $d$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of $v_2(p_{T})$ in $d$$+$Au and $^3$He$+$Au collisions, just as in large nucleus-nucleus ($A$$+$$A$) collisions, and a smaller splitting in $p$$+$Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low $p_T$ ($< 1.5$ GeV/$c$), but fail to describe various features at higher $p_T$. In all systems, the $v_2$ values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark($KE_T/n_q$), which was also seen previously in $A$$+$$A$ collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.09736v2-abstract-full').style.display = 'none'; document.getElementById('1710.09736v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">353 authors, 12 pages, 7 figures, 3 tables. v2 is version accepted for publication in Phys. Rev. C. Data tables are included in the Appendix. Plain text data tables for points plotted in figures for other PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 97, 064904 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.01014">arXiv:1710.01014</a> <span> [<a href="https://arxiv.org/pdf/1710.01014">pdf</a>, <a href="https://arxiv.org/format/1710.01014">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.03.044">10.1016/j.physletb.2018.03.044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Longitudinal double-spin asymmetry $A_1^{\rm p}$ and spin-dependent structure function $g_1^{\rm p}$ of the proton at small values of $x$ and $Q^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (204 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.01014v1-abstract-short" style="display: inline;"> We present a precise measurement of the proton longitudinal double-spin asymmetry $A_1^{\rm p}$ and the proton spin-dependent structure function $g_1^{\rm p}$ at photon virtualities $0.006~({\rm GeV}/c)^2<Q^2 < 1~({\rm GeV}/c)^2$ in the Bjorken $x$ range of $4 \times 10^{-5} < x < 4 \times 10^{-2}$. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.01014v1-abstract-full').style.display = 'inline'; document.getElementById('1710.01014v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.01014v1-abstract-full" style="display: none;"> We present a precise measurement of the proton longitudinal double-spin asymmetry $A_1^{\rm p}$ and the proton spin-dependent structure function $g_1^{\rm p}$ at photon virtualities $0.006~({\rm GeV}/c)^2<Q^2 < 1~({\rm GeV}/c)^2$ in the Bjorken $x$ range of $4 \times 10^{-5} < x < 4 \times 10^{-2}$. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energies of $160~{\rm GeV}$ and $200~{\rm GeV}$. The statistical precision is more than tenfold better than that of the previous measurement in this region. In the whole range of $x$, the measured values of $A_1^{\rm p}$ and $g_1^{\rm p}$ are found to be positive. It is for the first time that spin effects are found at such low values of $x$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.01014v1-abstract-full').style.display = 'none'; document.getElementById('1710.01014v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-263 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.07374">arXiv:1709.07374</a> <span> [<a href="https://arxiv.org/pdf/1709.07374">pdf</a>, <a href="https://arxiv.org/format/1709.07374">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.97.032006">10.1103/PhysRevD.97.032006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (206 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.07374v1-abstract-short" style="display: inline;"> A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07374v1-abstract-full').style.display = 'inline'; document.getElementById('1709.07374v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.07374v1-abstract-full" style="display: none;"> A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range $0.003 < x < 0.4$, fraction of the virtual photon energy carried by the hadron in the range $0.2 < z < 0.8$, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/$c)^2 < P_{\rm{hT}}^{2} < 3$ (GeV/$c$)$^2$. The multiplicities are presented as a function of $P_{\rm{hT}}^{2}$ in three-dimensional bins of $x$, $Q^2$, $z$ and compared to previous semi-inclusive measurements. We explore the small-$P_{\rm{hT}}^{2}$ region, i.e. $P_{\rm{hT}}^{2} < 1$ (GeV/$c$)$^2$, where hadron transverse momenta are expected to arise from non-perturbative effects, and also the domain of larger $P_{\rm{hT}}^{2}$, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small $P_{\rm{hT}}^{2}$ to study the dependence of the average transverse momentum $\langle P_{\rm{hT}}^{2}\rangle$ on $x$, $Q^2$ and $z$. The power-law behaviour of the multiplicities at large $P_{\rm{hT}}^{2}$ is investigated using various functional forms. The fits describe the data reasonably well over the full measured range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07374v1-abstract-full').style.display = 'none'; document.getElementById('1709.07374v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 20 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-253 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 97, 032006 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.02848">arXiv:1707.02848</a> <span> [<a href="https://arxiv.org/pdf/1707.02848">pdf</a>, <a href="https://arxiv.org/format/1707.02848">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.01.017">10.1016/j.physletb.2018.01.017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New analysis of $畏蟺$ tensor resonances measured at the COMPASS experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Jackura%2C+A">A. Jackura</a>, <a href="/search/hep-ex?searchtype=author&query=Fernandez-Ramirez%2C+C">C. Fernandez-Ramirez</a>, <a href="/search/hep-ex?searchtype=author&query=Mikhasenko%2C+M">M. Mikhasenko</a>, <a href="/search/hep-ex?searchtype=author&query=Pilloni%2C+A">A. Pilloni</a>, <a href="/search/hep-ex?searchtype=author&query=Mathieu%2C+V">V. Mathieu</a>, <a href="/search/hep-ex?searchtype=author&query=Nys%2C+J">J. Nys</a>, <a href="/search/hep-ex?searchtype=author&query=Pauk%2C+V">V. Pauk</a>, <a href="/search/hep-ex?searchtype=author&query=Szczepaniak%2C+A+P">A. P. Szczepaniak</a>, <a href="/search/hep-ex?searchtype=author&query=Fox%2C+G">G. Fox</a>, <a href="/search/hep-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a> , et al. (212 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1707.02848v1-abstract-short" style="display: inline;"> We present a new amplitude analysis of the $畏蟺$ $D$-wave in $蟺^- p\to 畏蟺^- p$ measured by COMPASS. Employing an analytical model based on the principles of the relativistic $S$-matrix, we find two resonances that can be identified with the $a_2(1320)$ and the excited $a_2^\prime(1700)$, and perform a comprehensive analysis of their pole positions. For the mass and width of the $a_2$ we find… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.02848v1-abstract-full').style.display = 'inline'; document.getElementById('1707.02848v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.02848v1-abstract-full" style="display: none;"> We present a new amplitude analysis of the $畏蟺$ $D$-wave in $蟺^- p\to 畏蟺^- p$ measured by COMPASS. Employing an analytical model based on the principles of the relativistic $S$-matrix, we find two resonances that can be identified with the $a_2(1320)$ and the excited $a_2^\prime(1700)$, and perform a comprehensive analysis of their pole positions. For the mass and width of the $a_2$ we find $M=(1307 \pm 1 \pm 6)$~MeV and $螕=(112 \pm 1 \pm 8)$~MeV, and for the excited state $a_2^\prime$ we obtain $M=(1720 \pm 10 \pm 60)$~MeV and $螕=(280\pm 10 \pm 70)$~MeV, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.02848v1-abstract-full').style.display = 'none'; document.getElementById('1707.02848v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-169 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.01796">arXiv:1707.01796</a> <span> [<a href="https://arxiv.org/pdf/1707.01796">pdf</a>, <a href="https://arxiv.org/format/1707.01796">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.07.008">10.1016/j.physletb.2018.07.008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for muoproduction of $X(3872)$ at COMPASS and indication of a new state $\widetilde{X}(3872)$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (203 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1707.01796v2-abstract-short" style="display: inline;"> We have searched for exclusive production of exotic charmonia in the reaction $渭^+~N \rightarrow 渭^+ (J\!/\!蠄蟺^+蟺^-)蟺^{\pm}~N'$ using COMPASS data collected with incoming muons of 160 GeV/$c$ and 200 GeV/$c$ momentum. In the $J\!/\!蠄蟺^+蟺^-$ mass distribution we observe a signal with a statistical significance of 4.1 $蟽$. Its mass and width are consistent with those of the $X(3872)$. The shape of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.01796v2-abstract-full').style.display = 'inline'; document.getElementById('1707.01796v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.01796v2-abstract-full" style="display: none;"> We have searched for exclusive production of exotic charmonia in the reaction $渭^+~N \rightarrow 渭^+ (J\!/\!蠄蟺^+蟺^-)蟺^{\pm}~N'$ using COMPASS data collected with incoming muons of 160 GeV/$c$ and 200 GeV/$c$ momentum. In the $J\!/\!蠄蟺^+蟺^-$ mass distribution we observe a signal with a statistical significance of 4.1 $蟽$. Its mass and width are consistent with those of the $X(3872)$. The shape of the $蟺^+蟺^-$ mass distribution from the observed decay into $J\!/\!蠄蟺^+蟺^-$ shows disagreement with previous observations for $X(3872)$. The observed signal may be interpreted as a possible evidence of a new charmonium state. It could be associated with a neutral partner of $X(3872)$ with $C = -1$ predicted by a tetraquark model. The product of cross section and branching fraction of the decay of the observed state into $J\!/\!蠄蟺^+蟺^-$ is determined to be 71$\pm$28(stat)$\pm$39(syst) pb. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.01796v2-abstract-full').style.display = 'none'; document.getElementById('1707.01796v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-165 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.00488">arXiv:1704.00488</a> <span> [<a href="https://arxiv.org/pdf/1704.00488">pdf</a>, <a href="https://arxiv.org/format/1704.00488">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.119.112002">10.1103/PhysRevLett.119.112002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aghasyan"> Aghasyan</a>, <a href="/search/hep-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/hep-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/hep-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/hep-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/hep-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/hep-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/hep-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/hep-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/hep-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/hep-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/hep-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/hep-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/hep-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/hep-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/hep-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/hep-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/hep-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/hep-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/hep-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (195 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.00488v1-abstract-short" style="display: inline;"> The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/$c$, $蟺^{-}$ beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mas… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.00488v1-abstract-full').style.display = 'inline'; document.getElementById('1704.00488v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.00488v1-abstract-full" style="display: none;"> The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/$c$, $蟺^{-}$ beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3 GeV/$c^2$ and 8.5 GeV/$c^2$. The observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of Quantum Chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. These DY results are obtained at a hard scale comparable to that of a recent COMPASS SIDIS measurement and hence allow unique tests of fundamental QCD universality predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.00488v1-abstract-full').style.display = 'none'; document.getElementById('1704.00488v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-059 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 119, 112002 (2017) </p> </li> </ol> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Andrieux%2C+V&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div 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